|Daughter taxa (time control age-window is: 0-800Ma)|
Unicyclic Neocrepidolithus with closed central area.
Neocrepidolithus with narrow central area filled with an axial cross. Clearly bicyclic in LM.
Bicyclic Neocrepidolithus with closed central area.
Neocrepidolithus with broad rim and narrow to closed central area. No obvious central structures and unicyclic in LM.
Medium to large Neocrepidolithus with a broad rim, unicyclic in XPL, and a narrow, vacant central area. The central area width is variable, usually around the same width as the rim, but may be narrower or closed.
Neocrepidolithus with bicyclic LM image and narrow to closed central area.
Specimens which cannot be assigned to any established species
Distinguishing features: Murolith (loxolith) coccoliths with broad, high rim and narrow or closed central-area, which may be spanned by bars.
Farinacci & Howe catalog pages: Neocrepidolithus *
Size: Most species are 4-7 µm long (ie. medium size) the prime exception is N. grandiculus which is much larger (7-13.5 µm)
|Metrics||Lith size: 4->13.5µm;|
Last occurrence (top): in lower part of Ypresian Stage (28% up, 53.7Ma, in Ypresian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Turonian Stage (0% up, 93.9Ma, in Turonian stage). Data source: Total of range of species in this database
Plot of occurrence data:
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